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Intelligence Differences Among Siblings: It's often believed that the firstborn child is the most intelligent. There's some scientific basis for this belief. Let's explore what the study says.

Does birth order affect children's intelligence?

Which Sibling Has the Highest IQ According to Science: Siblings raised in the same household often have very different intelligence, thinking patterns, and behavior. The question of why this difference exists despite similar upbringing, similar resources, and similar environments has long fascinated psychologists and researchers. Now, research is beginning to explain this mystery to some extent, with birth order also appearing to play a significant role.

Which child is more intelligent?

It's often believed that the firstborn child is the most intelligent. There's some scientific basis for this belief. According to a study by the University of Edinburgh, firstborn children were found to have more developed thinking abilities than their younger siblings. Similarly, economists from the University of Edinburgh, the Analysis Group, and the University of Sydney analyzed data from the US Bureau of Labor Statistics. This research found that firstborn children begin to outperform their siblings on intelligence tests as early as the age of one.

What are the reasons for this difference?

Several reasons have been suggested for this difference. The first reason is the parents' undivided attention. When a firstborn child is born, they receive all the parents' time and guidance. Research from the University of Edinburgh also revealed that even though parents provide equal emotional support to all children, the firstborn child receives more help with tasks related to mental development.

The effect of teaching

Another important factor is the effect of teaching. Older children often teach their younger siblings. This process strengthens their own knowledge and understanding. Therefore, teaching improves their learning ability. However, this does not mean that the middle or youngest child is less intelligent. Sometimes younger children excel in specific abilities, such as creativity, social understanding, or openness to new ideas.

The impact of changes in parenting

Another important aspect is parenting changes. Parents' behavior changes slightly with each child. As experience increases, their approach also changes, which inadvertently influences children's self-confidence, thinking, and personality. The most important thing for parents is to avoid confining their children to a single identity. Labels like "this one is the smartest" or "this one is naughty" have a deep impact on children's minds, and they begin to view themselves in that light. Instead, it's more important to focus on their children's efforts, hard work, and progress.